Remove SURGSIM_DOCUMENTATION_AUTOBUILD
Remove SURGSIM_DOCUMENTATION_AUTOBUILD

Remove SURGSIM_DOCUMENTATION_AUTOBUILD. If you select
BUILD_DOCUMENTATION the documentation will be built with the
project. Similar to what happened before when you enabled both
BUILD_DOCUMENTATION and SURGSIM_DOCUMENTATION_AUTOBUILD.

Also, changed Doxygen to be required. So if you turn on
BUILD_DOCUMENTATION, and doxygen isn't installed you will get an error.

simquest/opensurgsim,simquest/opensurgsim,simquest/opensurgsim,simquest/opensurgsim